<template>
  <div>
    <el-form ref="loginForm" :model="form" :rules="rules" label-width="80px" class="login-box">
      <h3 class="login-title">欢迎登录</h3>
      <el-form-item label="账号" prop="username">
        <el-input type="text" placeholder="请输入账号" v-model="form.username"/>
      </el-form-item>
      <el-form-item label="密码" prop="password">
        <el-input type="password" placeholder="请输入密码" v-model="form.password"/>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" v-on:click="onSubmit('loginForm')">登录</el-button>
      </el-form-item>
    </el-form>

    <el-dialog
      title="温馨提示"
      :visible.sync="dialogVisibleNull"
      width="30%"
      :before-close="handleClose">
      <span>请输入账号和密码</span>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogVisibleNull = false">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog
      title="温馨提示"
      :visible.sync="dialogVisibleWrong"
      width="30%"
      :before-close="handleClose">
      <span>账号密码错误</span>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogVisibleWrong = false">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>

export default {
  name: "Login",
  created() {
    this.$message("请登录")
  },
  data() {
    return {
      form: {
        username: '',
        password: '',
        flag:'',
        token:'',
      },

      // 表单验证，需要在 el-form-item 元素中增加 prop 属性
      rules: {
        username: [
          {required: true, message: '账号不可为空', trigger: 'blur'}
        ],
        password: [
          {required: true, message: '密码不可为空', trigger: 'blur'}
        ]
      },

      // 对话框显示和隐藏
      dialogVisibleNull: false,
      dialogVisibleWrong: false
    }
  },

  methods: {
    async onSubmit(formName) {
      // 为表单绑定验证功能
      this.$refs[formName].validate(async (valid) => {
        if (valid) {
          await this.getData();
          // 使用 vue-router 路由到指定页面，该方式称之为编程式导航
          if (this.form.flag == "密码正确") {
            await this.$router.push("/main");
          } else {
            this.dialogVisibleWrong = true;
          }
        } else {
          this.dialogVisibleNull = true;
          return false;
        }
      });
    },

    async getData(){
      var _this=this;
      await this.axios({
        method:"post",
        url:"http://192.168.1.3:8080/login",
        data:{
          userName:_this.form.username,
          password:_this.form.password,
        },
      }).then(function (response){
        _this.form.flag=response.data.msg;
        sessionStorage.setItem("userName",_this.form.username)
        sessionStorage.setItem("token",response.data.token);
      })
    },
  }
}
</script>

<style lang="scss" scoped>
.login-box {
  border: 1px solid #DCDFE6;
  width: 350px;
  margin: 180px auto;
  padding: 35px 35px 15px 35px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  box-shadow: 0 0 25px #909399;
}

.login-title {
  text-align: center;
  margin: 0 auto 40px auto;
  color: #303133;
}
</style>
